Systems and methods for indexing and linking electronic documents

ABSTRACT

The present disclosure provides various systems and methods for indexing digital (electronic) documents. The systems and methods may utilize various software, hardware, and firmware modules to identify notations, such as sheet names, anchors, and anchor references on construction documents. The identified notations are indexed and used to create hyperlinked pages that are easily navigable. In some embodiments, the hyperlinked pages may include previous- and next-sheet hyperlinks that allow for direct navigation within a set of pages, according to an order provided in an index.

TECHNICAL FIELD

This disclosure relates to machine-readable text analysis and databaseindexing. More specifically, this disclosure provides various systemsand methods for identifying internal cross-references within a set ofelectronic documents and indexing the same.

BRIEF DESCRIPTION OF THE DRAWINGS

Non-limiting and non-exhaustive embodiments of the disclosure aredescribed herein, including various embodiments of the disclosureillustrated in the figures listed below.

FIG. 1 illustrates a flow chart of a method for indexing a plurality ofpages that include various notations, including sheet name notations(sheet names), anchor notations (anchors), and anchor referencenotations (anchor references).

FIG. 2 illustrates a flow chart of a method for filtering and messagingmachine-readable text recognized using optical character recognition(OCR).

FIG. 3 illustrates a flow chart of a method for characterizing a sheetname notation as either a primary sheet name notation or a referencesheet name notation.

FIG. 4 illustrates a flow chart of a method for distinguishing betweenprimary sheet name notations, reference sheet name notations, and anchorsheet name notations (i.e. sub parts of an anchor).

FIG. 5 illustrates a flow chart of a method for identifying an anchorbased on the proximity of an anchor identifier to an anchor sheet name.

FIG. 6 illustrates a flow chart of a method for identifying an anchorreference based on the proximity of an anchor identifier to a referencesheet name.

FIG. 7 illustrates an example of a construction page that can beprocessed by the embodiments of the present disclosure.

FIG. 8 illustrates a close-up view of the anchor of FIG. 7.

FIGS. 9A-9D illustrate examples of portions of linked construction pagesand navigation between them using hyperlinked notations.

FIG. 10 illustrates an example of a portion of a construction page withmultiple versions of anchor references.

FIG. 11 illustrates an example of a portion of a construction page withan anchor.

FIG. 12 illustrates an example of the portion of the construction pageof FIG. 11 with a back link associated with the anchor being selectivelydisplayed.

FIG. 13 illustrates a close-up view of an anchor and an anchordescription.

FIG. 14 illustrates a construction page with reference sheet names, ananchor reference, and a primary sheet name.

FIG. 15 illustrates a close-up view of one type of anchor, including ananchor identifier and a primary sheet name.

FIG. 16 illustrates a close-up view of an alternative type of anchor,including an anchor identifier and a primary sheet name.

FIG. 17 illustrates an example of a construction page including twoanchors and no primary sheet name.

FIG. 18 illustrates an example of another type of anchor or anchorreference.

FIG. 19 illustrates a table of contents of a plurality of constructionpages.

FIG. 20 illustrates a back link of an anchor showing all the primarysheet names that have an anchor reference referring to the anchor.

FIG. 21A illustrates an embodiment of a graphical user interface forindexing notations and/or internally linking notations within aplurality of pages.

FIG. 21B illustrates an OCR messaging tab of the embodiment of thegraphical user interface of FIG. 21A.

FIG. 21C illustrates a sheet name whitelist tab of the embodiment of thegraphical user interface of FIG. 21A.

FIG. 21D illustrates a building name whitelist tab of the embodiment ofthe graphical user interface of FIG. 21A.

FIG. 21E illustrates an index (table of contents) page whitelist tab ofthe embodiment of the graphical user interface of FIG. 21A.

FIG. 22A illustrates a graphical user interface of a system whileindexing documents.

FIG. 22B illustrates a graphical user interface of a system whilerendering linked documents.

FIG. 22C illustrates a report on the statistics of the indexed andrendered documents.

FIG. 23 illustrates another example of a table of contents page for aplurality of construction pages.

FIG. 24 illustrates one of the pages referred to by the table ofcontents page of FIG. 23.

FIG. 25 illustrates another one of the pages referred to by the table ofcontents page of FIG. 23.

FIG. 26 illustrates a close-up view of an anchor and a primary sheetname of one of the pages referred to by the table of contents page ofFIG. 23.

FIG. 27 illustrates a system for indexing and linking electronicdocuments, according to one embodiment.

The described features, structures, and/or characteristics of thesystems and methods described herein may be combined in any suitablemanner in one or more alternative embodiments, and may differ from theillustrated embodiments.

DETAILED DESCRIPTION

The present disclosure provides various systems and methods for indexingdigital (electronic) documents. The present disclosure also providesvarious systems and methods for generating electronically linkeddocuments using the index. For clarity, the systems and methods areoften described in terms of steps of a method and/or as actionsperformed by a computing system. However, the systems and methodsdescribed herein may be implemented in hardware, software, and/orfirmware.

In various embodiments, an indexing system may receive a plurality ofdigital pages. The digital pages may be part of one or more electronicdocuments that have one digital page per document or multiple digitalpages per document. In some embodiments, the digital pages may havemachine-encoded text. For example, the digital pages may have beencreated in a word processor or other computer program that allows formachine-encoded text input.

In other embodiments, the digital pages may originate as scanned orimage-based digital pages. Optical character recognition (OCR) and/oranother image-text analysis technique may be utilized to generatedigital pages with machine-encoded text. For instance, a computerprocessor may perform the OCR or a human may manually convert image-textto machine-encoded text. In some embodiments, a combination of computerprocessing and manual inputs may be performed.

The machine-encoded text of each of the digital documents may beanalyzed to identify relevant notations. Although the systems andmethods may be utilized and/or readily adapted for use with variousdocument types and fields of interest, the remainder of thespecification uses construction plan documents as an example. In thatapplication, the indexing system may analyze the machine-encoded text toidentify notations such as sheet names, anchors, anchor references,building names, etc.

Sheet names identified on the pages may be categorized into primarysheet names and reference sheet names. Each page of the documents mayhave a primary sheet name, although some primary sheet names may beblank primary sheet names, such as a table of contents page and/or indexpage. A page may include one or more anchors. Each anchor may referencea particular portion of the page and may include an anchor description.An anchor may include just an anchor identifier, in which case it isunderstood that the anchor refers to the page on which it is found. Inother embodiments, an anchor may include an anchor identifier togetherwith a reference to the sheet name of the page on which it is found.That is, the anchor may include a reference to the primary sheet name toclarify that the anchor is associated with the page on which it isfound.

Additionally, a page may include one or more anchor references. Ananchor reference may be directed to an anchor on another page. Forexample, an anchor reference may include an anchor identifier and areference sheet name. The anchor identifier of the anchor reference isdirected to an anchor on the page corresponding to the reference sheetname. In some embodiments, the construction documents may refer to morethan one building. In that case each primary sheet name may beassociated with one or more of the buildings.

After identifying the various notations, the indexing system maygenerate an index that maps various associations between the primarysheet names, reference sheet names, anchors, anchor references, and/orbuilding names. An “index” may include various sub-indexes. An index maybe implemented using any of a wide variety of data types, arrays,mappings, tags, and structs, and/or any of a wide variety of associateddata structures.

The index may be used to generate various reports related to the indexednotations, such as the number of anchor references that reference aparticular sheet name or the number of sheet names not referenced by anyanchor reference. The index may also be used to generate a plurality oflinked pages corresponding to the originally indexed pages. The linkedpages may provide various hyperlinks and integrated reports. Forexample, the linked pages may include hyperlinks for each of the anchorreferences that, when selected, direct a user to the referenced sheetname and/or anchor.

In some embodiments, analyzing the machine-encoded text, categorizing,and/or otherwise identifying notations may incorporate the usage of oneor more whitelists and/or regular expressions. The term “regularexpression” as used herein may relate to any type of software, hardware,or firmware module configured to automatically identify textual materialthat corresponds to one or more patterns, including text-based andimage-based patterns. The term “regular expression” may also be used asdefined in any of a wide variety of programming languages, as would beunderstood by one of skill in the art.

Understanding that modules may be implemented in software, hardware,firmware, and/or a combination thereof, the system may include anotation identification module that identifies any of the variousnotations described herein. The system may include a categorizationmodule that distinguishes between primary and reference sheet names. Thesystem may also include an indexing module that indexes each of theplurality of pages and associates the notations with one another, asdescribed herein.

Reference throughout this specification to “one embodiment” or “anembodiment” means that a particular feature, structure, orcharacteristic described in connection with the embodiment is includedin at least one embodiment. Thus, the appearances of the phrases “in oneembodiment” and “in an embodiment” in various places throughout thisspecification are not necessarily all referring to the same embodiment.In particular, an “embodiment” may be a system, an article ofmanufacture (such as a computer-readable storage medium), a method,and/or a product of a process.

Furthermore, the described features, operations, or characteristics maybe combined in any suitable manner in one or more embodiments. The orderof the steps or actions of the methods described in connection with theembodiments disclosed may be varied. Thus, any order in the drawings orDetailed Description is for illustrative purposes only and is not meantto imply a required order, unless otherwise specified.

Embodiments may include various features, which may be embodied inmachine-executable instructions executed by a general-purpose orspecial-purpose computer (or other electronic device). Alternatively,the features may be performed by hardware components that includespecific logic for performing the steps or by a combination of hardware,software, and/or firmware.

Accordingly, the various components, modules, systems, and/or featuresdescribed herein may be embodied as modules within a system. Such asystem may be implemented in software, firmware, hardware, and/orphysical infrastructure. Although not always explicitly named herein, amodule may be identified (named) based on a function it performs. Forexample, a module that is configured to display something may comprisespecific hardware, software, or firmware and be properly referred to asa “display module.”

Embodiments may also be provided as a computer program product includinga non-transitory machine-readable medium having stored thereoninstructions that may be used to program, or be executed on, a computer(or other electronic device) to perform processes described herein. Themachine-readable medium may include, but is not limited to, hard drives,floppy diskettes, optical disks, CD-ROMs, DVD-ROMs, ROMs, RAMs, EPROMs,EEPROMs, magnetic or optical cards, solid-state memory devices, or othertypes of media/machine-readable media suitable for storing electronicinstructions. Moreover, a computer program product may be run, executed,downloaded, and/or otherwise used locally or remotely via a network.

The embodiments of the disclosure will be best understood by referenceto the drawings, wherein like elements are designated by like numeralsthroughout. In the following description, numerous specific details areprovided for a thorough understanding of the embodiments describedherein. However, those of skill in the art will recognize that one ormore of the specific details may be omitted, or other methods,components, or materials may be used. In some cases, operations are notshown or described in detail.

FIG. 1 illustrates a flow chart of a method 100 for receiving aplurality of pages and indexing various notations, including sheetnames, anchors, and anchor references. A system, such as a computingsystem comprising hardware, firmware, and/or software, may receive aplurality of digital pages, at 110. The system may receive the digitalpages as a set of individual documents or files. Alternatively, thesystem may receive the digital pages as a single document or file havingany number of pages.

In some embodiments, the digital pages may already includemachine-encoded text. In other embodiments, optical characterrecognition (OCR) may be used to generate corresponding digital pageswith machine-encoded text thereon, at 120. Alternatively,machine-encoded text that corresponds to text images on the originaldigital pages may be manually provided. The system may then analyze themachine-encoded text on each of the digital pages to identify one ormore types of notations, at 130. For example, the system may analyze themachine-encoded text to identify primary sheet names, reference sheetnames, anchors, anchor references, and/or building names.

In some embodiments, the system may identify sheet names and thenprocess the sheet names for categorization and subsequent indexing, at140. That is, each sheet name may be categorized as either a primarysheet name of a page or a reference sheet name that refers to theprimary sheet name of another page. Additionally, identified anchorsand/or anchor references may be processed and/or analyzed for indexing,at 150 and 160.

The system may generate an index that associates one or more of thesheet names (including primary and reference sheet names), anchors,and/or anchor references, at 170. For example, the index may associate aprimary sheet name notation with each of the plurality of digital pages,and associate each reference sheet name notation with the primary sheetname notation on the page on which it is identified.

FIG. 2 illustrates a flow chart of a method 200 for filtering andmessaging machine-readable text recognized using optical characterrecognition (OCR). As illustrated, a system may receive a document, suchas a document in the portable document format (PDF), at 210. Thedocument may include one or more pages and may include image-based text(e.g., handwritten, typewritten, printed, or other non-machine-encodedtext). The document may or may not also include some machine-encodedtext. The system may then perform OCR processing, at 220, to generatemachine-encoded text corresponding to the image-based text on thereceived document.

The system may then process the machine-encoded text using one or moreOCR filtering algorithms, at 230, to improve the accuracy of the OCRprocessing. As part of the OCR filtering or in addition to the OCRfiltering, the system may compare the machine-encoded text generated bythe OCR processing with a message whitelist, at 250. The messagewhitelist may include a mapping of incorrect portions of text (e.g., aletter, symbol, word, or phrase) with corrected versions. For example,if a portion of the machine-encoded text is matched with an element inthe message whitelist, the portion of the machine-encoded text may bereplaced with a corrected version, at 260. As a specific example, amessage whitelist may map the word “colour” with a replacement word“color.” Accordingly, the word “colour” may be replaced with the word“color” throughout the machine-encoded text on the document.

FIG. 3 illustrates a flow chart of a method 300 for characterizing asheet name as either a primary sheet name or a reference sheet name. Insome embodiments, the system may initially identify a sheet name aseither a primary sheet name or a reference sheet name. Alternatively,the system may identify a sheet name in general, at 305. If theidentified sheet name follows a primary sheet name definition (e.g.,matched a whitelist or satisfies a regular expression), at 310, thesystem may identify the sheet name as a primary sheet name, at 315.However, if the sheet name notation does not follow the primary sheetname definition, at 310, the system may identify the sheet name as areference sheet name, at 325. In some embodiments, if the sheet name isa primary sheet name, at 315, the system may determine if a buildingname is present, at 320, and identify the building name associated withthe sheet name, at 330.

FIG. 4 illustrates a flow chart of another method 400 for distinguishingbetween primary sheet names, reference sheet names, and anchor sheetnames that are part of an anchor. Initially, the system may identify anuncategorized sheet name. If a primary sheet name has not yet beenidentified for the page, at 410, and the uncategorized sheet namefollows a primary sheet name definition, at 420, then the uncategorizedsheet name may be categorized as a primary sheet name, at 440. If noprimary sheet name has been identified, at 410, and the uncategorizedsheet name does not follow the primary sheet name definition, at 420,the uncategorized sheet name may be identified as a reference sheetname, at 450.

If a primary sheet name has already been identified for the page, at410, and the uncategorized sheet name does not match the primary sheetname, at 430, the uncategorized sheet name may be identified as areference sheet name, at 450. If a primary sheet name has already beenidentified for the page, at 410, and the uncategorized sheet namematches the primary sheet name, at 430, the uncategorized sheet name maybe identified as an anchor sheet name, at 460.

As described above, an anchor reference may refer to an anchor onanother page. The anchor reference may include an anchor identifier anda reference sheet name, at 450. An anchor may include an anchoridentifier and/or an anchor identifier coupled with a reference to theprimary sheet name (an anchor sheet name).

FIG. 5 illustrates a flow chart of a method 500 for identifying ananchor based on the proximity of an anchor identifier to an anchor sheetname. If an anchor sheet name (i.e., a reference to the primary sheetname of the page on which the reference is located) has an anchoridentifier nearby, at 510, then an anchor is identified, at 520. If noanchor identifier is within a specified distance of the anchor sheetname, at 510, then the process ends without an anchor being identified.Once an anchor is identified, at 520, if there is text within aspecified range of the anchor, at 530, an anchor description may beassociated with the anchor, at 540.

FIG. 6 illustrates a flow chart of a method 600 for identifying ananchor reference based on the proximity of an anchor identifier to areference sheet name. In some embodiments, an anchor reference may onlybe identified if an anchor identifier is within a specific distance, at610, and/or in a particular direction relative to a reference sheetname, at 620 and 630. Otherwise, the identified anchor identifier maynot be an anchor reference, at 650. An anchor reference may beidentified and associated with the primary sheet name on which it isfound, the anchor to which it refers, the page to which it refers,and/or the primary sheet name to which it refers, at 640.

In each of FIGS. 1-6, methods are described that identify a notationwithin machine-encoded text. The notations may be identified and/orcategorized using a whitelist of one or more notations, by satisfyingpredefined criteria, by matching a predefined specification, and/orthrough the use of a regular expression. Although numerous variationsare possible, the following is an example of a regular expression thatmay be used to identify a sheet name:

public static readonly Regex SheetRegex = new Regex(@“ {circumflex over( )} (?<sheetName> (?<normalSheetName> [a-zA-Z]{1,3} [ ]?(?<badDash>“”)? ([\\.-]?[0-9]){1,6} ([\\.-]?[a-zA-Z])?[a-zA-Z]{0,3} ) |(?<coverSheet> [cC][sS][1-9] ) ) $ ”, RegexOptions.Compiled |RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

It will be appreciated by one of skill in the art that regularexpressions similar to the example above may be used to identify orcategorize building names, anchors, anchor references, and/or othernotations on one or more pages.

FIG. 7 illustrates an example of a construction page 700 that includes aprimary sheet name 710 and an anchor 715. The anchor 715 may beassociated with an anchor identifier, an anchor description 730, anddetail, elevation, section, or other image data 720 on the page 700. Thepage 700 may include additional image-based text, machine-encoded text,images, and/or other information, such as ownership information 740.

FIG. 8 illustrates a close-up view of an anchor 810 corresponding to theanchor 710 of FIG. 7. The anchor 810 on the page 800 may include ananchor identifier 812 and/or 815 and an anchor description 830. Theanchor 810 may be identified using a regular expression or other patternmatching algorithm.

FIGS. 9A-9D illustrate examples of portions of three linked constructionpages 900, 901, and 902. As previously described, the system mayidentify and index various notations on a plurality of pages, includingprimary sheet names, reference sheet names, anchor references, anchors,and possibly other notations. The index may map various relationshipsbetween each of the notations. The index may then be used to generateone or more linked pages, such as linked pages 900, 901, and 902.

As illustrated, the first linked page 900 of FIG. 9A may include a tableof contents 910 of various reference sheet names that refer to primarysheet names of other pages. Selecting a reference sheet name from thetable of contents 910, such as reference sheet name A-115, with a cursor(or other selection implement/method) may direct an operator to the page901 of FIG. 9B with the corresponding primary sheet name A-115, at 921.Accordingly, each reference sheet name in the table of contents 910 maybe a hyperlink that opens the hyperlinked page and/or navigates to thecorrect page within a document of multiple pages.

The second linked page 901 of FIG. 9B shows an anchor reference 920. Theanchor reference 920 may refer to a particular anchor on another pageand the primary sheet name of that other page. Accordingly, anchorreference 920 may include an anchor identifier (shown as the number 3)and a reference sheet name reference to the primary sheet name A-301 ofthe other page. Selecting the anchor identifier of the anchor reference920 may direct a user to a zoomed-in view of the corresponding anchor930 on the page 902 of FIG. 9C associated with the primary sheet nameA-301, at 931. Selecting the reference sheet name of the anchorreference 920 may direct a user to a zoomed-out view of the pageassociated with the primary sheet name A-301.

In FIG. 9C, the third linked page 902 includes A-301 as a primary sheetname 931, and an anchor 930 that refers to some image content or otherdetail, elevation, or section of the page 902. The anchor 930 mayinclude an anchor identifier (3) and a sheet name that is the same asthe primary sheet name 931 of the page 902 on which the anchor is found.In some embodiments, by clicking, right-clicking, mousing-over, and/orotherwise selecting or partially selecting the anchor 930 (or othernotation), a user may display a back link pop-up window 950 thatdisplays a listing of primary sheet names that reference the anchor 930,as shown in FIG. 9D. Similarly, a back link pop-up window may beavailable for other notations and may include a listing of sheet names,anchors, and/or anchor references associated with a selected notation.

FIG. 10 illustrates an example of a portion of a construction page 1000with multiple versions of anchor references 1010, 1020, 1025, and 1030,and an anchor 1015. As illustrated, each of the anchor references refersto an anchor (identified by one or more anchor identifiers) on anotherpage (identified by a reference sheet name).

FIG. 11 illustrates an example of a portion of a construction page 1100with an anchor 1110 associated with an image 1120 that provides variousdetails relating to a construction project. As previously described, thesystem may identify and index the anchor reference 1110 and distinguishit from other machine-encoded text, image-based text and/or imagecontent. The various systems and methods described above may be used toidentify and/or index any of the various notations described in any ofthe figures discussed herein.

FIG. 12 illustrates an example of a portion of a construction pagesimilar to the construction page illustrated in FIG. 11, but with a backlink 1215 associated with the anchor 1210 being selectively displayed.The back link 1215 may provide a listing of primary sheet names thatcorrespond to pages that have an anchor reference that refer to theanchor 1210. In some embodiments, each of the primary sheet names in theback link 1215 may be hyperlinks directed to the page corresponding tothe respective primary sheet names. In some embodiments, the hyperlinksmay automatically navigate a user to the hyperlinked page within adocument having multiple pages. In other embodiments, the hyperlinks mayautomatically open a separate file that has the hyperlinked page.

FIG. 13 illustrates a close-up view of another embodiment of an anchor1320 and an anchor description 1310. The illustrated anchor 1320 doesnot include a reference to the primary sheet name on which it is found.As described above, the system may be configured to identify and indexanchors in various forms and styles using a regular expression or otherprocessing and/or analyzing technique.

FIG. 14 illustrates a construction page 1400 with reference sheet names1420 within a keynotes box, an anchor reference 1415, and a primarysheet name 1410. The system, using the various methods described herein,may be configured to identify each of the reference sheet names 1420,the primary sheet name 1410 of the page, and the anchor reference 1415.The anchor reference 1415 may refer to an anchor identifier (2) on adifferent page that is associated with a primary sheet name (A427). Theindex may associate the primary sheet name 1410 with the page 1400 andeach reference sheet name 1420 with the primary sheet name for the pageon which it is identified and/or the pages to which it refers.

FIG. 15 illustrates a close-up view of one type of anchor 1510 on a page1500. As illustrated, the anchor 1510 may include an anchor identifier1515 (4) and a reference to the primary sheet name 1517 (A7.14) of thepage 1500 on which the anchor 1510 is located.

FIG. 16 illustrates a close-up view of an alternative type of an anchor1610 on a page 1600. As illustrated, the anchor 1610 may include ananchor identifier 1615 (2) and a reference to the primary sheet name1617 (A408) of the page 1600 on which the anchor 1610 is located. Theanchor 1610 may include an anchor description 1620 as well.

FIG. 17 illustrates an example of a construction page 1700 including twoanchors 1710 and 1720, and a blank primary sheet name. As in previousembodiments, each anchor 1710 and 1720 may refer to a non-text itemuseful for construction.

FIG. 18 illustrates an example of another type of anchor or anchorreference 1810 on a page 1800. As in previous embodiments, the anchorreference 1810 may include an anchor identifier 1817 (8) and a referencesheet name 1812 (A7.14). As may be appreciated by comparing the variousstyles of anchors and anchor references, complex regular expressionsand/or other pattern matching algorithms may be used to identify andindex each of the various types of notations within a plurality ofpages.

FIG. 19 illustrates a table of contents 1900 that includes references toa plurality of construction pages. The table of contents 1900 may have ablank primary sheet name. The table of contents may have any number ofreference sheet names 1910, 1920, and 1930 arranged in various columnsand/or rows. In some embodiments, the system may recognize and identifya table of contents 1900 based on characteristics associated with thecolumns and rows of reference sheet names 1910, 1920, and 1930. Each ofthe reference sheet names 1910, 1920, and 1930 may be hyperlinked to acorresponding page. According to various embodiments, the system mayidentify the table of contents 1900 using a whitelist of a file nameassociated with the page, using a page number of a document associatedwith the page, in response to a manual input, using a regularexpression, and/or using a pattern recognizing software module.

FIG. 20 illustrates another example of a back link 2010 of an anchor2020 showing all the primary sheet names that have one or more anchorreferences that refer to the anchor 2020. According to variousembodiments, each primary sheet name listed in the back link 2010 may bea hyperlink to a page corresponding to the primary sheet name. The backlink may be selectively viewed by selecting the anchor 2020 in general,the anchor identifier 2025, and/or a primary sheet reference in thebottom half of the circle (not illustrated). As in previous embodiments,the anchor 2020 may be associated with an anchor description 2030 withinthe index. A system may index the notations in each of the pages in aplurality of pages, as described herein, and use the associationsbetween the various notations to generate the back link 2010 illustratedon page 2000.

FIG. 21A illustrates an embodiment of a graphical user interface 2100for a system for indexing notations and/or internally linking notationswithin a plurality of pages. The system may be configured with one ormore modules that may execute on a computing device (e.g., ageneral-purpose or special-purpose computer). The modules may interactwith one or more hardware and/or firmware modules. The interfacereceives one or more documents containing one or more pages, at 2110.Various settings may be adjusted using a plurality of tabs 2120. FIG.21A illustrates a general link tab 2125 that allows for various options,such as rotation settings, cache settings, and/or specific requirementsfor identifying sheet names, anchors, and/or anchor references. Theinterface may also include various reporting and/or output options 2127.

In some embodiments, the system may generate an index of pages, primarysheet names, reference sheet names, anchors, and/or anchor references.The index generated by the system may include one or more associationsbetween each of the notations and/or pages. The system may also includevarious rendering options 2129 for generating linked pages (e.g.,hyperlinked PDF pages/documents). As illustrated, the rendering options2129 may include, for example, previous-page and next-page hyperlinks onone or more of the pages. The previous-page and next-page hyperlinks maybe directed to previous and next pages, respectively, according to anorder of pages listed on a table of contents page (also known as anindex page). The system may be executed by selecting the “GenerateLinked PDFs” button 2150. In various embodiments, other file typesbesides PDFs are possible and a user may select a desired output filetype.

FIG. 21B illustrates an OCR messaging tab 2130 of the embodiment of thegraphical user interface 2100 of FIG. 21A. The OCR messaging tab 2130may include a mapping of text (a letter, symbol, word, phrase, etc.)with corrected versions. For example, if a portion (e.g., a letter,symbol, word, or phrase) of the machine-encoded text is matched with anelement in the listed mapping, that portion of the machine-encoded textmay be replaced.

As illustrated, for example, any text matching “E6.01 b” would bereplaced with “E06.01 b.” The OCR messaging tab 2130 may allow forvarious common errors or anomalous errors to be automatically correctedthroughout a plurality of documents during the identification andindexing of the notations. The OCR messaging tab 2130 may also allow forchanges to be made to various portions of the text, even if they are noterroneous. For example, the primary sheet names of a set of documentsmay be revised automatically using the OCR messaging tab 2130.

FIG. 21C illustrates a sheet name whitelist tab 2135 of the embodimentof the graphical user interface 2100 of FIG. 21A. The sheet namewhitelist tab 2135 may include a list of primary and/or reference sheetnames that the system should automatically identify and index as primaryand/or sheet names, respectively, even if a regular expression or otherpattern recognizing software module does not identify them as sheetnames.

Similarly, FIG. 21D illustrates a building name whitelist tab 2137 ofthe embodiment of the graphical user interface 2100 of FIG. 21A. Thebuilding name whitelist tab 2137 may include a list of building namesthat the system should automatically identify and index as buildingnames, even if a regular expression or other pattern recognizingsoftware module does not identify those portions of machine-encoded textas building names.

FIG. 21E illustrates a table of contents page whitelist tab 2139 of theembodiment of the graphical user interface 2100 of FIG. 21A. The tableof contents page whitelist tab 2139 may include a list of table ofcontents pages that the system should automatically identify and indexas table of contents pages, even if a regular expression or otherpattern recognizing software module does not identify the pages as tableof contents pages. The table of contents pages may or may not includeprimary sheet names. In various embodiments, the index pages may beassigned a blank or hidden primary sheet name.

In some embodiments, the system may identify a primary sheet name foreach page of a plurality of pages. However, the primary sheet nameassociated with one or more index pages of the plurality of pages maynot be originally part of the pages received by the system. Rather, thesystem may distinguish between index pages (and possibly other pageswithout primary sheet names) by assigning (or using existing) uniqueidentification information for indexing purposes. Thus, while many pagesof a plurality of pages may include an explicit primary sheet name,index pages may or may not include a primary sheet name and may insteadinclude a blank primary sheet name and/or be otherwise uniquelyidentified within the index, which unique identification is referred toherein as a primary sheet name for simplicity.

FIG. 22A illustrates a graphical user interface 2200 of a graphical userinterface while indexing documents. As illustrated, one or moreprogressing 2235 and/or status 2240 bars may indicate a current progressof an identifying and/or indexing process. According to variousembodiments, the graphical user interface 2200 may include varioussteps, including an indexing step 2210, a rendering step 2220, and asummary display 2230.

FIG. 22B illustrates the graphical user interface 2200 of the graphicaluser interface while rendering linked documents, at 2220. Various statusand progress bars 2237, 2242, and 2250 may provide information to a userwho is waiting for the system to generate linked pages using the indexgenerated during the step illustrated in FIG. 22A. In some embodiments,the linked pages generated by the system correspond exactly to theoriginal pages received by the system, except that the notations,including the primary sheet names, reference sheet names, anchors,and/or anchor references, may be hyperlinks to the pages and/ornotations to which they refer. Additionally, next-page and previous-pagelinks and/or back link information may be generated for each page aswell.

In other embodiments, each of the linked pages generated by thegraphical user interface may be saved as a unique file, even if thepages originally received by the system were provided in one or moredocuments with multiple pages. In addition, the unique files for each ofthe linked pages may be saved with a file name corresponding to aprimary sheet name and/or building name. Moreover, the files for each ofthe linked pages may be organized within a database in an ordercorresponding to an order on an index or table of contents page.

FIG. 22C illustrates a report 2260 on the statistics of the indexed andrendered documents in the summary display 2230. The report may includestatistical information, such as the number of files created and thenumber of links generated.

FIG. 23 illustrates another example of a table of contents page 2310 fora plurality of construction pages. As illustrated the table of contentspage 2310 lists the primary sheet names of at least some of a pluralityof pages as reference sheet names 2321-2326 on the table of contentspage 2310. In the illustrated embodiment, the table of contents page2310 includes a primary reference sheet 2315. According to variousembodiments, a system may analyze the table of contents page 2310 andidentify and index notations, such as the reference sheet names2321-2326, and distinguish them from other machine-encoded text,descriptions, image-based text, stray lines, images, and/or othercontent on the table of contents page 2310.

The system may generate a corresponding linked page that appears similaror identical to the originally received table of contents page 2310. Thelinked page may include hyperlinks associated with each of the referencesheet names 2321-2326. Selecting a hyperlink associated with one of thereference sheet names 2321-2326 may direct a user to the pagecorresponding to the primary sheet name referenced by the referencesheet name 2321-2326. For example, selecting the reference sheet name(A8-04A) may automatically navigate the user to and/or open a page 2400illustrated in FIG. 24.

FIG. 24 illustrates the page 2400 with a primary sheet name 2410(A8-04A). The page 2400 may include one or more anchors and/or anchorreferences 2430 and 2440. The anchor 2440 may be associated with ananchor description 2445. In the illustrated embodiment, back linkinformation 2420 associated with the primary sheet name is selectivelydisplayed at 2415, such as when moused-over, clicked on with a pointingdevice, and/or touched on a touch screen device. The back linkinformation 2420 may include a listing of anchors, anchor references,and/or other pages that reference the primary sheet name 2410.

FIG. 25 illustrates a linked page 2500 that is referred to by the tableof contents page 2300 of FIG. 23. As illustrated, the linked page 2500includes a primary sheet name 2530 (A2.10). The page 2500 includesvarious anchor references 2540-2543. Each anchor reference refers to ananchor by including an anchor identifier and the primary sheet name ofthe sheet on which the associated anchor is found. In some embodiments,by selecting an anchor reference at 2550, back link information 2560showing which other pages have a similar or identical reference anchoris displayed.

Additionally, the linked page 2500 may include next-sheet andprevious-sheet hyperlinks 2510, 2520 that will navigate a user and/oropen the appropriate files according to the order illustrated in thetable of contents page 2300 of FIG. 23. Thus, using page 2500 as anexample, selecting the previous-sheet hyperlink 2520 would navigate theuser to and/or open a file that has a page associated with the primarysheet name A2.00. Similarly, selecting the next-sheet hyperlink 2510would navigate the user to and/or open a file that has a page associatedwith the primary sheet name A8-04A (i.e., page 2400 of FIG. 24).

Each of the anchor references 2540-2543 may include an anchor identifierand a reference sheet name. Each anchor reference 2540-2543 may compriseone or more hyperlinks associated with at least the page that has theprimary sheet name referenced by the reference sheet name of each of theanchor references. Similarly, the anchor identifier may be a hyperlinkthat directs a user directly to a zoomed-in view of the anchor on thepage associated with the primary sheet name referenced by the referencesheet name. In the illustrated embodiment, each of the anchor references2540-2543 refers to an anchor (either A1 or E1) on the page associatedwith the primary sheet name A6.11.

FIG. 26 illustrates a close-up view of an anchor 2620 (A1) on the pageassociated with a primary sheet name 2630 (A6.11). The anchor 2620 maybe a section anchor, as described in the anchor description 2610.

FIG. 27 illustrates a system 2710 for indexing and/or generating linkedpages, as described herein. As previously described, each of the variousmodules may be implemented in software, hardware, firmware, and/or acombination thereof. Moreover, the computing device 2710 may compriseany number of disparate computing devices.

As illustrated, the computing system 2710 may include a processor 2730and/or a memory 2732 for interfacing with each of the various modules2741-2746. The computing device 2710 may include a receiving module 2741configured to receive one or more digital pages. The computing device2710 may include a notation identification module 2742 configured toidentify any of the various notations described herein, including sheetnames, anchors, and anchor references. The computing device 2710 mayinclude a categorization module 2743 configured to categorize each ofthe identified sheet name notations as either primary sheet namenotations or reference sheet name notations. The computing device 2710may include an indexing module 2744 configured to generate an index thatassociates various identified notations with one another. For example,an indexing module may generate an index that associates a primary sheetname notation with each of the plurality of digital pages, associateseach reference sheet name notation with the primary sheet name notationon which it is identified, associates each anchor notation with aprimary sheet name notation, and/or associates each anchor referencenotation with the anchor notation and primary sheet notation to which itrefers.

The computing device 2710 may include a whitelist module 2745 configuredto identify one or more of the various notations described herein bycomparing at least a portion of the machine-encoded text with one ormore of a whitelist of primary sheet name, a whitelist of referencesheet names, a whitelist of anchors, and/or a whitelist of anchorreferences. The computing device 2710 may include a page generationmodule configured to generate a plurality of linked pages using theindexed notations, as described herein. In some embodiments, a user mayinteract directly with the computing device 2710. In other embodiments,the computing device(s) 2710 may be accessed remotely. For example, aclient device 2750 may interact with the computing device(s) 2710.

Many changes may be made to the details of the above-describedembodiments without departing from the underlying principles and scopeof the present disclosure. Accordingly, the scope of the presentlydescribed systems and methods should be determined by the followingclaims.

What is claimed:
 1. A computer-implemented method comprising: receiving,at a computing device, a plurality of digital pages havingmachine-encoded text, wherein the machine-encoded text includes aplurality of notations, including primary sheet name notations,reference sheet name notations, anchor notations, and anchor referencenotations, wherein each of the plurality of digital pages includes atleast one notation; identifying, by the computing device, sheet namenotations on the plurality of digital pages; categorizing each of theidentified sheet name notations as one of a primary sheet name notationand a reference sheet name notation, wherein at least one of theplurality of digital pages includes at least one reference sheet namenotation, and wherein each reference sheet name notation refers to aprimary sheet name notation on another of the plurality of digitalpages; identifying anchor notations on the plurality of digital pages,wherein each anchor notation is associated with at least a section ofthe page on which it is identified; identifying anchor referencenotations on the plurality of digital pages, wherein each anchorreference notation includes (1) a reference sheet name notation and (2)a reference to an anchor notation on the page corresponding to theprimary sheet name notation referred to by the reference sheet namenotation; and generating an index that: associates each identifiedprimary sheet name notation with one of the plurality of digital pages,associates each reference sheet name notation with the primary sheetname notation on which it is identified, associates each anchor notationwith a primary sheet name notation, and associates each anchor referencenotation with the anchor notation and primary sheet notation to which itrefers; generating a first linked page corresponding to one of thereceived digital pages, wherein the first linked page includes an anchornotation and a primary sheet name notation; and generating a secondlinked page corresponding to one of the received digital pages, whereinthe second linked page includes an anchor reference notation, the anchorreference notation associated within the index with the anchor notationand the primary sheet name notation of the first linked page within theindex, and wherein the anchor reference notation of the second linkedpage comprises one or more hyperlinks directed to at least one of theprimary sheet name notation and the anchor notation of the first linkedpage.
 2. The method of claim 1, wherein identifying each of the primarysheet name notations, reference sheet name notations, anchor notations,and anchor reference notations comprises using one or more regularexpressions.
 3. The method of claim 1 further comprising: identifying atleast one building name notation associated with at least one indexedprimary sheet name notation; and associating the at least one buildingname notation with the at least one indexed primary sheet name notationwithin the index.
 4. The method of claim 1, further comprising:generating a report of the index that includes one or more of: a reportof indexed anchor reference notations that refer to an anchor notationthat is not in the index, a report of indexed anchor references thatrefer to a primary sheet name notation that is not in the index, and areport of reference sheet name notations that refer to a primary sheetname notation that is not in the index.
 5. The method of claim 1,wherein identifying each of the primary sheet name notations, referencesheet name notations, anchor notations, and anchor reference notationsis at least partially performed by: comparing at least a portion of themachine-encoded text with at least one whitelist including one or moreof whitelisted primary sheet names, whitelisted reference sheet names,whitelisted anchors, and whitelisted anchor references.
 6. The method ofclaim 1, further comprising: generating a plurality of linked pages,wherein each of the linked pages corresponds to one of the receiveddigital pages; providing a hyperlink for each reference sheet namenotation to the associated primary sheet notation within the index; andproviding at least one hyperlink for each anchor reference notation, thehyperlink directed to at least one of the associated primary sheet namenotation and the associated anchor notation within the index.
 7. Themethod of claim 6, wherein at least one of the linked pages comprises atable of contents page with an ordered listing of reference sheet namenotations each associated with a primary sheet name of one of theplurality of digital pages within the index, wherein each of theplurality of linked pages includes a next-page hyperlink directed to asubsequent linked page on the table of contents page according to theordered listing of reference sheet name notations, and wherein each ofthe plurality of linked pages includes a previous-page hyperlinkdirected to a preceding linked page on the table of contents pageaccording to the ordered listing of reference sheet name notations. 8.The method of claim 6, further comprising: associating selectivelyviewable back link information with at least one of the hyperlinkednotations, wherein the back link information associated with eachhyperlinked notation comprises a report of linked pages, listed byprimary sheet name notations, that reference the hyperlinked notation.9. The method of claim 8, wherein each of the listed primary sheet namenotations within the report comprises a hyperlink to the page associatedwith the primary sheet name notation within the index.
 10. The method ofclaim 1, wherein each anchor notation comprises one of a detail anchornotation, an elevation anchor notation, and a section anchor notation.11. The method of claim 1, wherein at least one anchor notationcomprises an elevation callout detail.
 12. A non-transitory computerreadable storage medium storing instructions that, when executed by aprocessor, are configured to cause the processor to perform operationsfor indexing digital pages, the operations comprising: receiving aplurality of digital pages having machine-encoded text, wherein themachine-encoded text of the plurality of digital pages includes aplurality of notations, including primary sheet name notations,reference sheet name notations, anchor notations, and anchor referencenotations, wherein each of the plurality of digital pages includes atleast one notation; identifying sheet name notations on the plurality ofdigital pages; categorizing each of the identified sheet name notationsas one of a primary sheet name notation and a reference sheet namenotation, wherein at least one of the plurality of digital pagesincludes at least one reference sheet name notation, and wherein eachreference sheet name notation refers to a primary sheet name notation onanother of the plurality of digital pages; identifying anchor notationson the plurality of digital pages, wherein each anchor notation isassociated with an adjacent section of a page; identifying anchorreference notations on the plurality of digital pages, wherein eachanchor reference notation includes (1) a reference sheet name notationand (2) a reference to an anchor notation on the page corresponding tothe primary sheet name notation referred to by the reference sheet namenotation; and generating an index that: associates each identifiedprimary sheet name notation with one of the plurality of digital pages,associates each reference sheet name notation with the primary sheetname notation to which it refers, associates each anchor notation with aprimary sheet name notation, and associates each anchor referencenotation with the anchor notation and primary sheet notation on which itis identified; generating a first linked page corresponding to one ofthe received digital pages, wherein the first linked page includes ananchor notation and a primary sheet name notation; and generating asecond linked page corresponding to one of the received digital pages,wherein the second linked page includes an anchor reference notation,the anchor reference notation associated with the anchor notation andthe primary sheet name notation of the first linked page within theindex, and wherein the anchor reference notation of the second linkedpage comprises one or more hyperlinks directed to at least one of theprimary sheet name notation and the anchor notation of the first linkedpage.
 13. The computer readable medium of claim 12, wherein theoperations further comprise: comparing at least a portion of themachine-encoded text with a whitelist of building names to identifybuilding name notations on the plurality of digital pages that match awhitelisted building name; and associating the building name notationswith one of a corresponding primary sheet name notation and a referencesheet name notation within the index.
 14. The computer readable mediumof claim 12, wherein at least one anchor notation comprises an elevationcallout detail.